PT - JOURNAL ARTICLE AU - Samuel K. Yue TI - Morphological Findings of Asymmetrical and Dystrophic Psoas and Piriformis Muscles in Chronic Lower Back Pain during CT Guided Botulinum Toxin Injections AID - 10.1136/rapm-00115550-199823031-00104 DP - 1998 May 01 TA - Regional Anesthesia & Pain Medicine PG - 104--104 VI - 23 IP - Suppl 1 4099 - http://rapm.bmj.com/content/23/Suppl_1/104.short 4100 - http://rapm.bmj.com/content/23/Suppl_1/104.full SO - Reg Anesth Pain Med1998 May 01; 23